Medium chromium alloy wear-resistant steel
Wet ball mill liner long-term in alkaline or acidic liquid medium work, at the same time by the ball, ore impact, wear and corrosion of the medium. Failure forms mainly wear, corrosion and fracture. In order to ensure the service life of liner, liner material should have reasonable mechanical properties to match, that is, with high strength, high toughness and high hardness, but also should have a certain anti-corrosion ability.
Currently, the commonly used ball mill lining material is ZCMn13, the surface hardness of its residual body after use only HB260 a 350, impact hardening characteristics failed to give full play, poor wear resistance, short life expectancy. At the same time, high resistance to plastic deformation of low manganese steel, lining in the process of using often easy to deform, causing the liner bite each other, so that the maintenance of demolition difficult. In order to solve the problems of high manganese steel liner in use and improve the service life of the liner, in recent years we have developed a low alloy steel liner, the factory production trial, the effect is good. However, the main structure of low-alloy steel is martensite and a small amount of carbide, wear resistance needs to be improved, and the ball mill liner easily fracture failure occurs in the late use, life is still not significantly improved, rich New energy sales through the ball mill, Raymond Mill and other mill machinery and equipment.
Medium chromium alloy wear-resistant steel can be used as ball mill liner material. Production according to the use of Dun Dun conditions and material requirements of the different and the actual production conditions of the factory, the choice of the use of cast heat treatment isothermal quenching or quenching quenching + tempering process for heat treatment.